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  1. /*
  2.  * Copyright (c) 2012 Martin Storsjo
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. /*
  22.  * To create a simple file for smooth streaming:
  23.  * ffmpeg <normal input/transcoding options> -movflags frag_keyframe foo.ismv
  24.  * ismindex -n foo foo.ismv
  25.  * This step creates foo.ism and foo.ismc that is required by IIS for
  26.  * serving it.
  27.  *
  28.  * With -ismf, it also creates foo.ismf, which maps fragment names to
  29.  * start-end offsets in the ismv, for use in your own streaming server.
  30.  *
  31.  * By adding -path-prefix path/, the produced foo.ism will refer to the
  32.  * files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc
  33.  * file can be set with the -ismc-prefix option similarly.
  34.  *
  35.  * To pre-split files for serving as static files by a web server without
  36.  * any extra server support, create the ismv file as above, and split it:
  37.  * ismindex -split foo.ismv
  38.  * This step creates a file Manifest and directories QualityLevel(...),
  39.  * that can be read directly by a smooth streaming player.
  40.  *
  41.  * The -output dir option can be used to request that output files
  42.  * (both .ism/.ismc, or Manifest/QualityLevels* when splitting)
  43.  * should be written to this directory instead of in the current directory.
  44.  * (The directory itself isn't created if it doesn't already exist.)
  45.  */
  46.  
  47. #include <stdio.h>
  48. #include <string.h>
  49.  
  50. #include "cmdutils.h"
  51.  
  52. #include "libavformat/avformat.h"
  53. #include "libavformat/isom.h"
  54. #include "libavformat/os_support.h"
  55. #include "libavutil/intreadwrite.h"
  56. #include "libavutil/mathematics.h"
  57.  
  58. static int usage(const char *argv0, int ret)
  59. {
  60.     fprintf(stderr, "%s [-split] [-ismf] [-n basename] [-path-prefix prefix] "
  61.                     "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
  62.     return ret;
  63. }
  64.  
  65. struct MoofOffset {
  66.     int64_t time;
  67.     int64_t offset;
  68.     int64_t duration;
  69. };
  70.  
  71. struct Track {
  72.     const char *name;
  73.     int64_t duration;
  74.     int bitrate;
  75.     int track_id;
  76.     int is_audio, is_video;
  77.     int width, height;
  78.     int chunks;
  79.     int sample_rate, channels;
  80.     uint8_t *codec_private;
  81.     int codec_private_size;
  82.     struct MoofOffset *offsets;
  83.     int timescale;
  84.     const char *fourcc;
  85.     int blocksize;
  86.     int tag;
  87. };
  88.  
  89. struct Tracks {
  90.     int nb_tracks;
  91.     int64_t duration;
  92.     struct Track **tracks;
  93.     int video_track, audio_track;
  94.     int nb_video_tracks, nb_audio_tracks;
  95. };
  96.  
  97. static int expect_tag(int32_t got_tag, int32_t expected_tag) {
  98.     if (got_tag != expected_tag) {
  99.         char got_tag_str[4], expected_tag_str[4];
  100.         AV_WB32(got_tag_str, got_tag);
  101.         AV_WB32(expected_tag_str, expected_tag);
  102.         fprintf(stderr, "wanted tag %.4s, got %.4s\n", expected_tag_str,
  103.                 got_tag_str);
  104.         return -1;
  105.     }
  106.     return 0;
  107. }
  108.  
  109. static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
  110. {
  111.     int32_t size, tag;
  112.  
  113.     size = avio_rb32(in);
  114.     tag  = avio_rb32(in);
  115.     avio_wb32(out, size);
  116.     avio_wb32(out, tag);
  117.     if (expect_tag(tag, tag_name) != 0)
  118.         return -1;
  119.     size -= 8;
  120.     while (size > 0) {
  121.         char buf[1024];
  122.         int len = FFMIN(sizeof(buf), size);
  123.         int got;
  124.         if ((got = avio_read(in, buf, len)) != len) {
  125.             fprintf(stderr, "short read, wanted %d, got %d\n", len, got);
  126.             break;
  127.         }
  128.         avio_write(out, buf, len);
  129.         size -= len;
  130.     }
  131.     return 0;
  132. }
  133.  
  134. static int skip_tag(AVIOContext *in, int32_t tag_name)
  135. {
  136.     int64_t pos = avio_tell(in);
  137.     int32_t size, tag;
  138.  
  139.     size = avio_rb32(in);
  140.     tag  = avio_rb32(in);
  141.     if (expect_tag(tag, tag_name) != 0)
  142.         return -1;
  143.     avio_seek(in, pos + size, SEEK_SET);
  144.     return 0;
  145. }
  146.  
  147. static int write_fragment(const char *filename, AVIOContext *in)
  148. {
  149.     AVIOContext *out = NULL;
  150.     int ret;
  151.  
  152.     if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0) {
  153.         char errbuf[100];
  154.         av_strerror(ret, errbuf, sizeof(errbuf));
  155.         fprintf(stderr, "Unable to open %s: %s\n", filename, errbuf);
  156.         return ret;
  157.     }
  158.     ret = copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
  159.     if (!ret)
  160.         ret = copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
  161.  
  162.     avio_flush(out);
  163.     avio_close(out);
  164.  
  165.     return ret;
  166. }
  167.  
  168. static int skip_fragment(AVIOContext *in)
  169. {
  170.     int ret;
  171.     ret = skip_tag(in, MKBETAG('m', 'o', 'o', 'f'));
  172.     if (!ret)
  173.         ret = skip_tag(in, MKBETAG('m', 'd', 'a', 't'));
  174.     return ret;
  175. }
  176.  
  177. static int write_fragments(struct Tracks *tracks, int start_index,
  178.                            AVIOContext *in, const char *basename,
  179.                            int split, int ismf, const char* output_prefix)
  180. {
  181.     char dirname[2048], filename[2048], idxname[2048];
  182.     int i, j, ret = 0, fragment_ret;
  183.     FILE* out = NULL;
  184.  
  185.     if (ismf) {
  186.         snprintf(idxname, sizeof(idxname), "%s%s.ismf", output_prefix, basename);
  187.         out = fopen(idxname, "w");
  188.         if (!out) {
  189.             ret = AVERROR(errno);
  190.             perror(idxname);
  191.             goto fail;
  192.         }
  193.     }
  194.     for (i = start_index; i < tracks->nb_tracks; i++) {
  195.         struct Track *track = tracks->tracks[i];
  196.         const char *type    = track->is_video ? "video" : "audio";
  197.         snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
  198.         if (split) {
  199.             if (mkdir(dirname, 0777) == -1 && errno != EEXIST) {
  200.                 ret = AVERROR(errno);
  201.                 perror(dirname);
  202.                 goto fail;
  203.             }
  204.         }
  205.         for (j = 0; j < track->chunks; j++) {
  206.             snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
  207.                      dirname, type, track->offsets[j].time);
  208.             avio_seek(in, track->offsets[j].offset, SEEK_SET);
  209.             if (ismf)
  210.                 fprintf(out, "%s %"PRId64, filename, avio_tell(in));
  211.             if (split)
  212.                 fragment_ret = write_fragment(filename, in);
  213.             else
  214.                 fragment_ret = skip_fragment(in);
  215.             if (ismf)
  216.                 fprintf(out, " %"PRId64"\n", avio_tell(in));
  217.             if (fragment_ret != 0) {
  218.                 fprintf(stderr, "failed fragment %d in track %d (%s)\n", j,
  219.                         track->track_id, track->name);
  220.                 ret = fragment_ret;
  221.             }
  222.         }
  223.     }
  224. fail:
  225.     if (out)
  226.         fclose(out);
  227.     return ret;
  228. }
  229.  
  230. static int64_t read_trun_duration(AVIOContext *in, int default_duration,
  231.                                   int64_t end)
  232. {
  233.     int64_t dts = 0;
  234.     int64_t pos;
  235.     int flags, i;
  236.     int entries;
  237.     int64_t first_pts = 0;
  238.     int64_t max_pts = 0;
  239.     avio_r8(in); /* version */
  240.     flags = avio_rb24(in);
  241.     if (default_duration <= 0 && !(flags & MOV_TRUN_SAMPLE_DURATION)) {
  242.         fprintf(stderr, "No sample duration in trun flags\n");
  243.         return -1;
  244.     }
  245.     entries = avio_rb32(in);
  246.  
  247.     if (flags & MOV_TRUN_DATA_OFFSET)        avio_rb32(in);
  248.     if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) avio_rb32(in);
  249.  
  250.     pos = avio_tell(in);
  251.     for (i = 0; i < entries && pos < end; i++) {
  252.         int sample_duration = default_duration;
  253.         int64_t pts = dts;
  254.         if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(in);
  255.         if (flags & MOV_TRUN_SAMPLE_SIZE)     avio_rb32(in);
  256.         if (flags & MOV_TRUN_SAMPLE_FLAGS)    avio_rb32(in);
  257.         if (flags & MOV_TRUN_SAMPLE_CTS)      pts += avio_rb32(in);
  258.         if (sample_duration < 0) {
  259.             fprintf(stderr, "Negative sample duration %d\n", sample_duration);
  260.             return -1;
  261.         }
  262.         if (i == 0)
  263.             first_pts = pts;
  264.         max_pts = FFMAX(max_pts, pts + sample_duration);
  265.         dts += sample_duration;
  266.         pos = avio_tell(in);
  267.     }
  268.  
  269.     return max_pts - first_pts;
  270. }
  271.  
  272. static int64_t read_moof_duration(AVIOContext *in, int64_t offset)
  273. {
  274.     int64_t ret = -1;
  275.     int32_t moof_size, size, tag;
  276.     int64_t pos = 0;
  277.     int default_duration = 0;
  278.  
  279.     avio_seek(in, offset, SEEK_SET);
  280.     moof_size = avio_rb32(in);
  281.     tag  = avio_rb32(in);
  282.     if (expect_tag(tag, MKBETAG('m', 'o', 'o', 'f')) != 0)
  283.         goto fail;
  284.     while (pos < offset + moof_size) {
  285.         pos = avio_tell(in);
  286.         size = avio_rb32(in);
  287.         tag  = avio_rb32(in);
  288.         if (tag == MKBETAG('t', 'r', 'a', 'f')) {
  289.             int64_t traf_pos = pos;
  290.             int64_t traf_size = size;
  291.             while (pos < traf_pos + traf_size) {
  292.                 pos = avio_tell(in);
  293.                 size = avio_rb32(in);
  294.                 tag  = avio_rb32(in);
  295.                 if (tag == MKBETAG('t', 'f', 'h', 'd')) {
  296.                     int flags = 0;
  297.                     avio_r8(in); /* version */
  298.                     flags = avio_rb24(in);
  299.                     avio_rb32(in); /* track_id */
  300.                     if (flags & MOV_TFHD_BASE_DATA_OFFSET)
  301.                         avio_rb64(in);
  302.                     if (flags & MOV_TFHD_STSD_ID)
  303.                         avio_rb32(in);
  304.                     if (flags & MOV_TFHD_DEFAULT_DURATION)
  305.                         default_duration = avio_rb32(in);
  306.                 }
  307.                 if (tag == MKBETAG('t', 'r', 'u', 'n')) {
  308.                     return read_trun_duration(in, default_duration,
  309.                                               pos + size);
  310.                 }
  311.                 avio_seek(in, pos + size, SEEK_SET);
  312.             }
  313.             fprintf(stderr, "Couldn't find trun\n");
  314.             goto fail;
  315.         }
  316.         avio_seek(in, pos + size, SEEK_SET);
  317.     }
  318.     fprintf(stderr, "Couldn't find traf\n");
  319.  
  320. fail:
  321.     return ret;
  322. }
  323.  
  324. static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
  325. {
  326.     int ret = AVERROR_EOF, track_id;
  327.     int version, fieldlength, i, j;
  328.     int64_t pos   = avio_tell(f);
  329.     uint32_t size = avio_rb32(f);
  330.     struct Track *track = NULL;
  331.  
  332.     if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
  333.         goto fail;
  334.     version = avio_r8(f);
  335.     avio_rb24(f);
  336.     track_id = avio_rb32(f); /* track id */
  337.     for (i = start_index; i < tracks->nb_tracks && !track; i++)
  338.         if (tracks->tracks[i]->track_id == track_id)
  339.             track = tracks->tracks[i];
  340.     if (!track) {
  341.         /* Ok, continue parsing the next atom */
  342.         ret = 0;
  343.         goto fail;
  344.     }
  345.     fieldlength = avio_rb32(f);
  346.     track->chunks  = avio_rb32(f);
  347.     track->offsets = av_mallocz_array(track->chunks, sizeof(*track->offsets));
  348.     if (!track->offsets) {
  349.         track->chunks = 0;
  350.         ret = AVERROR(ENOMEM);
  351.         goto fail;
  352.     }
  353.     // The duration here is always the difference between consecutive
  354.     // start times.
  355.     for (i = 0; i < track->chunks; i++) {
  356.         if (version == 1) {
  357.             track->offsets[i].time   = avio_rb64(f);
  358.             track->offsets[i].offset = avio_rb64(f);
  359.         } else {
  360.             track->offsets[i].time   = avio_rb32(f);
  361.             track->offsets[i].offset = avio_rb32(f);
  362.         }
  363.         for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
  364.             avio_r8(f);
  365.         for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
  366.             avio_r8(f);
  367.         for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
  368.             avio_r8(f);
  369.         if (i > 0)
  370.             track->offsets[i - 1].duration = track->offsets[i].time -
  371.                                              track->offsets[i - 1].time;
  372.     }
  373.     if (track->chunks > 0) {
  374.         track->offsets[track->chunks - 1].duration = track->offsets[0].time +
  375.                                                      track->duration -
  376.                                                      track->offsets[track->chunks - 1].time;
  377.     }
  378.     // Now try and read the actual durations from the trun sample data.
  379.     for (i = 0; i < track->chunks; i++) {
  380.         int64_t duration = read_moof_duration(f, track->offsets[i].offset);
  381.         if (duration > 0 && abs(duration - track->offsets[i].duration) > 3) {
  382.             // 3 allows for integer duration to drift a few units,
  383.             // e.g., for 1/3 durations
  384.             track->offsets[i].duration = duration;
  385.         }
  386.     }
  387.     if (track->chunks > 0) {
  388.         if (track->offsets[track->chunks - 1].duration <= 0) {
  389.             fprintf(stderr, "Calculated last chunk duration for track %d "
  390.                     "was non-positive (%"PRId64"), probably due to missing "
  391.                     "fragments ", track->track_id,
  392.                     track->offsets[track->chunks - 1].duration);
  393.             if (track->chunks > 1) {
  394.                 track->offsets[track->chunks - 1].duration =
  395.                     track->offsets[track->chunks - 2].duration;
  396.             } else {
  397.                 track->offsets[track->chunks - 1].duration = 1;
  398.             }
  399.             fprintf(stderr, "corrected to %"PRId64"\n",
  400.                     track->offsets[track->chunks - 1].duration);
  401.             track->duration = track->offsets[track->chunks - 1].time +
  402.                               track->offsets[track->chunks - 1].duration -
  403.                               track->offsets[0].time;
  404.             fprintf(stderr, "Track duration corrected to %"PRId64"\n",
  405.                     track->duration);
  406.         }
  407.     }
  408.     ret = 0;
  409.  
  410. fail:
  411.     avio_seek(f, pos + size, SEEK_SET);
  412.     return ret;
  413. }
  414.  
  415. static int read_mfra(struct Tracks *tracks, int start_index,
  416.                      const char *file, int split, int ismf,
  417.                      const char *basename, const char* output_prefix)
  418. {
  419.     int err = 0;
  420.     const char* err_str = "";
  421.     AVIOContext *f = NULL;
  422.     int32_t mfra_size;
  423.  
  424.     if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
  425.         goto fail;
  426.     avio_seek(f, avio_size(f) - 4, SEEK_SET);
  427.     mfra_size = avio_rb32(f);
  428.     avio_seek(f, -mfra_size, SEEK_CUR);
  429.     if (avio_rb32(f) != mfra_size) {
  430.         err = AVERROR_INVALIDDATA;
  431.         err_str = "mfra size mismatch";
  432.         goto fail;
  433.     }
  434.     if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
  435.         err = AVERROR_INVALIDDATA;
  436.         err_str = "mfra tag mismatch";
  437.         goto fail;
  438.     }
  439.     while (!read_tfra(tracks, start_index, f)) {
  440.         /* Empty */
  441.     }
  442.  
  443.     if (split || ismf)
  444.         err = write_fragments(tracks, start_index, f, basename, split, ismf,
  445.                               output_prefix);
  446.     err_str = "error in write_fragments";
  447.  
  448. fail:
  449.     if (f)
  450.         avio_close(f);
  451.     if (err)
  452.         fprintf(stderr, "Unable to read the MFRA atom in %s (%s)\n", file, err_str);
  453.     return err;
  454. }
  455.  
  456. static int get_private_data(struct Track *track, AVCodecContext *codec)
  457. {
  458.     track->codec_private_size = 0;
  459.     track->codec_private      = av_mallocz(codec->extradata_size);
  460.     if (!track->codec_private)
  461.         return AVERROR(ENOMEM);
  462.     track->codec_private_size = codec->extradata_size;
  463.     memcpy(track->codec_private, codec->extradata, codec->extradata_size);
  464.     return 0;
  465. }
  466.  
  467. static int get_video_private_data(struct Track *track, AVCodecContext *codec)
  468. {
  469.     AVIOContext *io = NULL;
  470.     uint16_t sps_size, pps_size;
  471.     int err;
  472.  
  473.     if (codec->codec_id == AV_CODEC_ID_VC1)
  474.         return get_private_data(track, codec);
  475.  
  476.     if ((err = avio_open_dyn_buf(&io)) < 0)
  477.         goto fail;
  478.     err = AVERROR(EINVAL);
  479.     if (codec->extradata_size < 11 || codec->extradata[0] != 1)
  480.         goto fail;
  481.     sps_size = AV_RB16(&codec->extradata[6]);
  482.     if (11 + sps_size > codec->extradata_size)
  483.         goto fail;
  484.     avio_wb32(io, 0x00000001);
  485.     avio_write(io, &codec->extradata[8], sps_size);
  486.     pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
  487.     if (11 + sps_size + pps_size > codec->extradata_size)
  488.         goto fail;
  489.     avio_wb32(io, 0x00000001);
  490.     avio_write(io, &codec->extradata[11 + sps_size], pps_size);
  491.     err = 0;
  492.  
  493. fail:
  494.     track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
  495.     return err;
  496. }
  497.  
  498. static int handle_file(struct Tracks *tracks, const char *file, int split,
  499.                        int ismf, const char *basename,
  500.                        const char* output_prefix)
  501. {
  502.     AVFormatContext *ctx = NULL;
  503.     int err = 0, i, orig_tracks = tracks->nb_tracks;
  504.     char errbuf[50], *ptr;
  505.     struct Track *track;
  506.  
  507.     err = avformat_open_input(&ctx, file, NULL, NULL);
  508.     if (err < 0) {
  509.         av_strerror(err, errbuf, sizeof(errbuf));
  510.         fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
  511.         return 1;
  512.     }
  513.  
  514.     err = avformat_find_stream_info(ctx, NULL);
  515.     if (err < 0) {
  516.         av_strerror(err, errbuf, sizeof(errbuf));
  517.         fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
  518.         goto fail;
  519.     }
  520.  
  521.     if (ctx->nb_streams < 1) {
  522.         fprintf(stderr, "No streams found in %s\n", file);
  523.         goto fail;
  524.     }
  525.  
  526.     for (i = 0; i < ctx->nb_streams; i++) {
  527.         struct Track **temp;
  528.         AVStream *st = ctx->streams[i];
  529.  
  530.         if (st->codec->bit_rate == 0) {
  531.             fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
  532.                     st->id, file);
  533.             continue;
  534.         }
  535.  
  536.         track = av_mallocz(sizeof(*track));
  537.         if (!track) {
  538.             err = AVERROR(ENOMEM);
  539.             goto fail;
  540.         }
  541.         temp = av_realloc_array(tracks->tracks,
  542.                                 tracks->nb_tracks + 1,
  543.                                 sizeof(*tracks->tracks));
  544.         if (!temp) {
  545.             av_free(track);
  546.             err = AVERROR(ENOMEM);
  547.             goto fail;
  548.         }
  549.         tracks->tracks = temp;
  550.         tracks->tracks[tracks->nb_tracks] = track;
  551.  
  552.         track->name = file;
  553.         if ((ptr = strrchr(file, '/')))
  554.             track->name = ptr + 1;
  555.  
  556.         track->bitrate   = st->codec->bit_rate;
  557.         track->track_id  = st->id;
  558.         track->timescale = st->time_base.den;
  559.         track->duration  = st->duration;
  560.         track->is_audio  = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
  561.         track->is_video  = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
  562.  
  563.         if (!track->is_audio && !track->is_video) {
  564.             fprintf(stderr,
  565.                     "Track %d in %s is neither video nor audio, skipping\n",
  566.                     track->track_id, file);
  567.             av_freep(&tracks->tracks[tracks->nb_tracks]);
  568.             continue;
  569.         }
  570.  
  571.         tracks->duration = FFMAX(tracks->duration,
  572.                                  av_rescale_rnd(track->duration, AV_TIME_BASE,
  573.                                                 track->timescale, AV_ROUND_UP));
  574.  
  575.         if (track->is_audio) {
  576.             if (tracks->audio_track < 0)
  577.                 tracks->audio_track = tracks->nb_tracks;
  578.             tracks->nb_audio_tracks++;
  579.             track->channels    = st->codec->channels;
  580.             track->sample_rate = st->codec->sample_rate;
  581.             if (st->codec->codec_id == AV_CODEC_ID_AAC) {
  582.                 track->fourcc    = "AACL";
  583.                 track->tag       = 255;
  584.                 track->blocksize = 4;
  585.             } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
  586.                 track->fourcc    = "WMAP";
  587.                 track->tag       = st->codec->codec_tag;
  588.                 track->blocksize = st->codec->block_align;
  589.             }
  590.             get_private_data(track, st->codec);
  591.         }
  592.         if (track->is_video) {
  593.             if (tracks->video_track < 0)
  594.                 tracks->video_track = tracks->nb_tracks;
  595.             tracks->nb_video_tracks++;
  596.             track->width  = st->codec->width;
  597.             track->height = st->codec->height;
  598.             if (st->codec->codec_id == AV_CODEC_ID_H264)
  599.                 track->fourcc = "H264";
  600.             else if (st->codec->codec_id == AV_CODEC_ID_VC1)
  601.                 track->fourcc = "WVC1";
  602.             get_video_private_data(track, st->codec);
  603.         }
  604.  
  605.         tracks->nb_tracks++;
  606.     }
  607.  
  608.     avformat_close_input(&ctx);
  609.  
  610.     err = read_mfra(tracks, orig_tracks, file, split, ismf, basename,
  611.                     output_prefix);
  612.  
  613. fail:
  614.     if (ctx)
  615.         avformat_close_input(&ctx);
  616.     return err;
  617. }
  618.  
  619. static void output_server_manifest(struct Tracks *tracks, const char *basename,
  620.                                    const char *output_prefix,
  621.                                    const char *path_prefix,
  622.                                    const char *ismc_prefix)
  623. {
  624.     char filename[1000];
  625.     FILE *out;
  626.     int i;
  627.  
  628.     snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
  629.     out = fopen(filename, "w");
  630.     if (!out) {
  631.         perror(filename);
  632.         return;
  633.     }
  634.     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
  635.     fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
  636.     fprintf(out, "\t<head>\n");
  637.     fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
  638.                  "content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
  639.     fprintf(out, "\t</head>\n");
  640.     fprintf(out, "\t<body>\n");
  641.     fprintf(out, "\t\t<switch>\n");
  642.     for (i = 0; i < tracks->nb_tracks; i++) {
  643.         struct Track *track = tracks->tracks[i];
  644.         const char *type    = track->is_video ? "video" : "audio";
  645.         fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
  646.                 type, path_prefix, track->name, track->bitrate);
  647.         fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
  648.                      "valueType=\"data\" />\n", track->track_id);
  649.         fprintf(out, "\t\t\t</%s>\n", type);
  650.     }
  651.     fprintf(out, "\t\t</switch>\n");
  652.     fprintf(out, "\t</body>\n");
  653.     fprintf(out, "</smil>\n");
  654.     fclose(out);
  655. }
  656.  
  657. static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
  658.                                const char *type)
  659. {
  660.     int i, j;
  661.     int64_t pos = 0;
  662.     struct Track *track = tracks->tracks[main];
  663.     int should_print_time_mismatch = 1;
  664.  
  665.     for (i = 0; i < track->chunks; i++) {
  666.         for (j = main + 1; j < tracks->nb_tracks; j++) {
  667.             if (tracks->tracks[j]->is_audio == track->is_audio) {
  668.                 if (track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) {
  669.                     fprintf(stderr, "Mismatched duration of %s chunk %d in %s (%d) and %s (%d)\n",
  670.                             type, i, track->name, main, tracks->tracks[j]->name, j);
  671.                     should_print_time_mismatch = 1;
  672.                 }
  673.                 if (track->offsets[i].time != tracks->tracks[j]->offsets[i].time) {
  674.                     if (should_print_time_mismatch)
  675.                         fprintf(stderr, "Mismatched (start) time of %s chunk %d in %s (%d) and %s (%d)\n",
  676.                                 type, i, track->name, main, tracks->tracks[j]->name, j);
  677.                     should_print_time_mismatch = 0;
  678.                 }
  679.             }
  680.         }
  681.         fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" ",
  682.                 i, track->offsets[i].duration);
  683.         if (pos != track->offsets[i].time) {
  684.             fprintf(out, "t=\"%"PRId64"\" ", track->offsets[i].time);
  685.             pos = track->offsets[i].time;
  686.         }
  687.         pos += track->offsets[i].duration;
  688.         fprintf(out, "/>\n");
  689.     }
  690. }
  691.  
  692. static void output_client_manifest(struct Tracks *tracks, const char *basename,
  693.                                    const char *output_prefix, int split)
  694. {
  695.     char filename[1000];
  696.     FILE *out;
  697.     int i, j;
  698.  
  699.     if (split)
  700.         snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
  701.     else
  702.         snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
  703.     out = fopen(filename, "w");
  704.     if (!out) {
  705.         perror(filename);
  706.         return;
  707.     }
  708.     fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
  709.     fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
  710.                  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
  711.     if (tracks->video_track >= 0) {
  712.         struct Track *track = tracks->tracks[tracks->video_track];
  713.         struct Track *first_track = track;
  714.         int index = 0;
  715.         fprintf(out,
  716.                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
  717.                 "Chunks=\"%d\" "
  718.                 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
  719.                 tracks->nb_video_tracks, track->chunks);
  720.         for (i = 0; i < tracks->nb_tracks; i++) {
  721.             track = tracks->tracks[i];
  722.             if (!track->is_video)
  723.                 continue;
  724.             fprintf(out,
  725.                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
  726.                     "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
  727.                     "CodecPrivateData=\"",
  728.                     index, track->bitrate, track->fourcc, track->width, track->height);
  729.             for (j = 0; j < track->codec_private_size; j++)
  730.                 fprintf(out, "%02X", track->codec_private[j]);
  731.             fprintf(out, "\" />\n");
  732.             index++;
  733.             if (track->chunks != first_track->chunks)
  734.                 fprintf(stderr, "Mismatched number of video chunks in %s (id: %d, chunks %d) and %s (id: %d, chunks %d)\n",
  735.                         track->name, track->track_id, track->chunks, first_track->name, first_track->track_id, first_track->chunks);
  736.         }
  737.         print_track_chunks(out, tracks, tracks->video_track, "video");
  738.         fprintf(out, "\t</StreamIndex>\n");
  739.     }
  740.     if (tracks->audio_track >= 0) {
  741.         struct Track *track = tracks->tracks[tracks->audio_track];
  742.         struct Track *first_track = track;
  743.         int index = 0;
  744.         fprintf(out,
  745.                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
  746.                 "Chunks=\"%d\" "
  747.                 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
  748.                 tracks->nb_audio_tracks, track->chunks);
  749.         for (i = 0; i < tracks->nb_tracks; i++) {
  750.             track = tracks->tracks[i];
  751.             if (!track->is_audio)
  752.                 continue;
  753.             fprintf(out,
  754.                     "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
  755.                     "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
  756.                     "BitsPerSample=\"16\" PacketSize=\"%d\" "
  757.                     "AudioTag=\"%d\" CodecPrivateData=\"",
  758.                     index, track->bitrate, track->fourcc, track->sample_rate,
  759.                     track->channels, track->blocksize, track->tag);
  760.             for (j = 0; j < track->codec_private_size; j++)
  761.                 fprintf(out, "%02X", track->codec_private[j]);
  762.             fprintf(out, "\" />\n");
  763.             index++;
  764.             if (track->chunks != first_track->chunks)
  765.                 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
  766.                         track->name, first_track->name);
  767.         }
  768.         print_track_chunks(out, tracks, tracks->audio_track, "audio");
  769.         fprintf(out, "\t</StreamIndex>\n");
  770.     }
  771.     fprintf(out, "</SmoothStreamingMedia>\n");
  772.     fclose(out);
  773. }
  774.  
  775. static void clean_tracks(struct Tracks *tracks)
  776. {
  777.     int i;
  778.     for (i = 0; i < tracks->nb_tracks; i++) {
  779.         av_freep(&tracks->tracks[i]->codec_private);
  780.         av_freep(&tracks->tracks[i]->offsets);
  781.         av_freep(&tracks->tracks[i]);
  782.     }
  783.     av_freep(&tracks->tracks);
  784.     tracks->nb_tracks = 0;
  785. }
  786.  
  787. int main(int argc, char **argv)
  788. {
  789.     const char *basename = NULL;
  790.     const char *path_prefix = "", *ismc_prefix = "";
  791.     const char *output_prefix = "";
  792.     char output_prefix_buf[2048];
  793.     int split = 0, ismf = 0, i;
  794.     struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
  795.  
  796.     av_register_all();
  797.  
  798.     for (i = 1; i < argc; i++) {
  799.         if (!strcmp(argv[i], "-n")) {
  800.             basename = argv[i + 1];
  801.             i++;
  802.         } else if (!strcmp(argv[i], "-path-prefix")) {
  803.             path_prefix = argv[i + 1];
  804.             i++;
  805.         } else if (!strcmp(argv[i], "-ismc-prefix")) {
  806.             ismc_prefix = argv[i + 1];
  807.             i++;
  808.         } else if (!strcmp(argv[i], "-output")) {
  809.             output_prefix = argv[i + 1];
  810.             i++;
  811.             if (output_prefix[strlen(output_prefix) - 1] != '/') {
  812.                 snprintf(output_prefix_buf, sizeof(output_prefix_buf),
  813.                          "%s/", output_prefix);
  814.                 output_prefix = output_prefix_buf;
  815.             }
  816.         } else if (!strcmp(argv[i], "-split")) {
  817.             split = 1;
  818.         } else if (!strcmp(argv[i], "-ismf")) {
  819.             ismf = 1;
  820.         } else if (argv[i][0] == '-') {
  821.             return usage(argv[0], 1);
  822.         } else {
  823.             if (!basename)
  824.                 ismf = 0;
  825.             if (handle_file(&tracks, argv[i], split, ismf,
  826.                             basename, output_prefix))
  827.                 return 1;
  828.         }
  829.     }
  830.     if (!tracks.nb_tracks || (!basename && !split))
  831.         return usage(argv[0], 1);
  832.  
  833.     if (!split)
  834.         output_server_manifest(&tracks, basename, output_prefix,
  835.                                path_prefix, ismc_prefix);
  836.     output_client_manifest(&tracks, basename, output_prefix, split);
  837.  
  838.     clean_tracks(&tracks);
  839.  
  840.     return 0;
  841. }
  842.